Automatic liquid fuel dispenser



Dec. 1, 1931. c. BRAHY AUTOMATIC LIQUID FUEL DISPENSER 1 I i l 1 12v ENTO BY ATTORN EY ,n, h MM w UH g m 5 4 i S @w 5 v 2 U 4 I x L; a I HH H H 6 9 l 7 8 a .m L

2% m 5 6 d 0 1m 2e 2 I m m 4 5 Q I 9 2} 5 B a GO 5 d M x M 0 54 3 ;Dec. 1, 1931. c BRAHY AUTOMATIC LIQUID FUEL DISPENSER 2 Sheets-Sheet 2 Filed Oct. 8, 1929 INVENTO BY M ATTORNEY Patented Dec. 1, 1931 Units!) STATES CHARLES BRAHY, OF NEW PATENT ori-ice- Yonx, n.1,

. NEW YORK, n. Y.

ASSIGNOR TO CHARLES E. MARION, OE

AUTOMATIC LIeUInrUEL nrsrmwsan Application filed. October 8,1929. 7 Serial No. 39s',ie1.

This application is a continuation in part of my application for automatic liquid fuel dispensers filed concurrentl herewith, as well as o1 my application filed Iarch 28th, 1928, Serial No. 265,257, and of lily-application filed August 28th, 1929,'Seriall:No. 388,956, the scope of this application covering improvements in the pump control and disis to provide means to cause the return of the 7 fuel to the storage tank when the flow through the outlet hose is stopped; Still another object of this invention is to provide a heat insulating air chamber around the pump cylinder to maintain an even temperature of the fuel stored therein. Another object is to provide proper ventilation in apparatus of this kind, to prevent the excessive accumulation of combustible vapors around such electrical elements as are subject to sparking. A further object of my invention is to provide a simple method of indicating the amount of fuel dispensed during each stroke of the pump piston. "And still a further object is to providea construction enabling easy access to be had to the piston rod stufiing box and to the piston, sothat repairs andreplace-- ments can be readily made. i

Other objects will appear fromthe description hereinafter given. I v Referring to the drawings:

Fig. 1 is a front sectional. elevation of my invention, showing theconstruction and'general arrangement of the parts.

Fig. 2 is a sectional rear view of the back portion of the coin'control'box, showing the switch controlling solenoids and the wiring diagram. r v

Fig. '3 is a'fraginentary' section along line rod 9 being secured to the 'middle of beam 6.

i 3 of Fig. 1, showing a side view of the adusting mechanism to. vary the length of the piston stroke, the bracket 51, strap 52 and member 54A being shown here, although omitted iii-Fig.1. v i i Fig. 4 is a fragmentary sectional plan taken along line 4-4 of Fig. 3.

Fig. 5 is a fragmentary and partial sectionalelevation of my invention, showing the arrangementofthe coin slot shutter mechanism as controlled by the hand outlet valve, and by the Heat in the fuel supply tankf In the drawings, the motor 1 connects with the gear Wheel 2 through the medium of a series of speed reducing gears as shown. The

connecting-rod 3 is adjustably fixedalong the slot 4 and is pivotally attached to the beam 5. Attached to the ends of beam 5' and beam 6 are the guide rods 7 'ljhe piston 10 is provided with two piston rings ll and 12 as 'shown, and the cylinder head 13 isprovided wlth two stuffing boxes14 andS the piston and 15. The cylinder 16 is surrounded by another cylinder 17, whereby a heat insulating airchambeflS between the two said cylinders is formed. Carried by the rod Sis the indicator 19, behind which is the scale 20 calibrated to indicate the amount of fuel dispensed during each stroke of the piston! The casing 21 is provided with the air vents 22, 23, 24 and 25, for ventilating purposes.

The pipe 26 leads from, the main supply tank through the one-way valves 27 and 28 and into the intake ports 29 and 30 respec-v tively; and" the outlet ports '31 and 32coni-j municate through. one-way valves 33 and 34 respectively, and throughthe three-way valve 35, with the hose 36. Connected to the said three-Way valve 35 is the return line 37 to the fuel supply tank, said line having the one. way pressure relief 'valve. 38 thereon; Handle 39 perm-its manual operation of valve member 48 which is suitably fixed within the aperture in plate'43 contains the slot 4, withlee in engagement with the worm 57 carried by the bracket 58. The shaft carrying the worm 57 has at its end the socket 59, with which the end 60 of the crank handle 61 is engageable.

The flanged member 48 contains notched surfaces 85 and 86, having tooth-like elements thereon with recesses between them. Adapted to fit into these recesses are the teeth or protruding elements 87 which are integral with the collar 88 slidably mounted over the bolt 49 and positioned adjacent the flanged member 48. At the threaded end of bolt 49 are the lock nuts 89.

Referring to Fig. '5, the pin 62 in the valve 35 and which is movable in the direction of the arrow, has tied to it the end of the cable 63, which is mounted over the'pulleys 64, 65, 66 and-67. The end 68 of this cable is attached to the insulator 69, to which is attached the rod 70 which passes through the gland .71 and to which is attached the cable 72 mounted over pulley 73. The coin slot shutter 74 is fastened to cable 72 and cable 75, which is mounted over pulley7 6 and attached to the counterweight 77. Attached to insulator 69 is cable 78, to the lower end of which is attached the float rod 79 which is secured to the float 80, contained within the fuel supply tank 81. The casings 82 and 83 are separatedby a sheet of insulation 84. 1 I w A detailed description of thecoin control mechanism will not be attempted here in view of the fact that this apparatus is substantially the same as that disclosed in the application above referred to and filed concurrently herewith. However, the various parts constituting such mechanism will be hereinafter referred to when it will become necessary to describe the operation of this apparatus. i

When a coin is deposited within the coin slot 90, it drops through the coin slide 91 and into the temporary coin receptacle 92, bringing thecontacts 93 together. This operates the relay comprisingthe contact solenoids 94 and 95, thereby closing the circuit through the motor 1 and setting the gear 2 into mo tion. This motion is transmitted to the pump piston 10 through the cross beams 5 and 6, the rods 7 and 8, and the piston rod 9.

The upward movement of the piston will draw fuel from line 26 through valve 28 and inlet 30, into the cylinder 16. Simultaneously with this intake, there will be a discharge of the fuel already stored in the up per part ofthe cylinder from a previous stroke, through the outlet 31, the valves 33 and 35, into hose 36 and out through the nozzle of said hose. On the downstroke of the piston, the fuel in the bottom of the cylinder is similarly discharged through the outlet 32, valves-34 and35, and out through the hose; and at the same time fuel is drawn into the cylinder through the pipe 26, the valves 27 and the inlet port 29.

At the end of the. downstroke of the piston and at the consequent completion of a revolution of the gear wheel 2, the cam 96 will engage the-tripper lever 97, causing a movement of the tripper rod98 inthe direction of the arrow. This motion is transmitted through the lever 99, against the action of the counterweight 100, to the rod 101. The

downward movement of this rod is connnunicated to the said temporary coin receptacle 92, which swings down in a clockwise direction until the coin therein is dropped through chute 102 and into coin deposit box 103. When the said receptacle 92 is relieved varyingthe length of stroke of piston 10,

which is effected by fixing the. lower end of connecting rod 3 in different positions along the slot 4, to correspond with predetermined settings. Thus, if the price of fuel were to go up, it would be desirable to have a smaller stroke, so as to dispense less fuel for a coin of a given denomination, and consequently the position of the lowerend of the connecting rod 3 would be moved towards the center of gear wheel 2. p

In order to make the adjustment within the slot 4, it'is necessary to first back off the nuts 89, so as to release the bolt 49 and the parts mounted thereon from the fixed position within the slot 4. The collar 88 is now moved away from thenotched surfaces 85 and 86, thereby releasing the teeth 87 from engagement with the recesses in said surfaces; and thecollar is then turned through an angle of about ninety degrees so that the teeth 87 are completely out of engagement with the notched surfaces. The crank handle 61 is now turned so that the worm 57 will actuate gear 56, causing the bolt 55 to turn,

and the carriage nut 54 to move longitudinally along the bolt. As the bracket 51 is secured to the carriage nut 54 by member 54a, it will move with the said nut and cause the bolt 49 to move within the slot 4 against the resisting action of the fuel surrounded piston. When the desired position is reached, the collar 88 is turned until the teeth 87 are in engagement with adjacent recesses in surfaces and 86. The nuts 89 are now tight-- ened, so that the connecting rod 3 is in its new position, set and adjusted to provide the proper stroke for the piston to dispense the required amount of fuel.

If for some reason it becomes necessary to stop the flow of fuel through the nozzle, the hand valve 40 is closed by turning it in the direction of the arrow. Any fuel being discharged from the cylinder at such a time will pass through the three-way valve 35, through the one-way pressurerelief valve 38, through return pipe 37 and back into the fuel storage tank. This result can also be attained by turning the handle 39 in the direction of the arrow, which operates the threeway valve 35 to close the outlet to the hose 36 and keep the outlet to pipe 37 open. -When the handle 39 is so turned, the pin 62 follows the movement of this handle, and carries with it the end of the cable 63. As a result, the cable moves over the pulleys 64, 65, 66 and 67, and causes a downward movement of rod 70. The cable 72 mounted over the pulley 73,

moves the shutter 74 in the direction of the arrow, against the action of counterweight i this downward movement is transmitted to cable 72, moving the shutter 74 to the left, to its closed position.

then the tank 81 is filled to capacity, or when the level of fuel therein reaches a predetermined height, the block 107 mounted on the float rod 79, comes into contact with the surface 108 of the flanged cover cap 109, thereby limiting the upward movement of float 80 and in this way preventing an undue slackening of cable 78. The tube 110 serves as a housing for the underground portion of cable 78. I

The coin control box82 is electrically separated from casing 83 by the insulation 84 and the insulator 69. This keeps the entire pump-insulated from said coin control box, which is highly desirable in view of the combustible vapors that may be prevalent in the pump portion of this apparatus.

The vents 22, 23, 24 and 25, in the pump casing '21 prevent the excessive accumulation of gaseous vapors within the pump housing,

and hence, lessen the danger of these combustible gases coming into contact with such electrical parts as are subject to sparking The vents 111, 112, 113, and 114, serve a similar purpose; and the motor housing serves as a further precaution against the danger. of igniting the gaseous vapors.

. The arrangement of cross beams .5 and. 60

into the pump body is prevented. This .ar-

rangement also permits the use of indicator 19 and'gage 20, providing an extremely simple, yet accurate method of measuring the quantity of fuel dispensed.

In view of the fact that fuel may be stored in the cylinder 16 for a considerable period of timebefore being dispensed, a concentric heat insulating cylinder 17 is provided around cylinder 16. This cylinder, together with theair space 18 between the two said cylinders, is effective in keeping the temperature of the fuel within cylinder 16 compar- 1 atively constant.

The particular formof apparatus disclosed in the drawings and in the description herein given, consitutes but one of many different mechanical forms that can beembodied in my invention.

What I claim is:

1. In an automatic liquid fuel dispenser, the combination of a reciprocating fuel pump, and adjusting means adapted to vary the length of stroke of the pump piston in such manner as to maintain an equal displacement on each side of the transverse center line of the cylinder, the said adjusting means comprising the combination of a connecting rod, a wheel, a slotted aperture radially disposed on said wheel, hand-controlled geared means to move the lower end'of said connecting rod longitudinally along said aperture, and means to pivotally lock said lower end at a predetermined slotted aperture. I

2. In an automatic liquid fuel dispenser, a pump piston, adjusting. means adapted to vary the length of stroke of said piston, comprising a connecting rod adapted to-actuate the piston, a slotted aperture having notched surfaces thereon, a bolt extending through said aperture and pivotally attached to the position along said lowerendof sa'i-d connecting rod, a carriage nut mounted on a suitably positioned carriage bolt hand-controlled means to cause said carture, connecting means to transmit the inotion of said carriage nut'to the said lower end of the connecting rod, means to engage said notched surfaces at a predetermined position, and means to pivotally lock said lower end at such position. v

3. In an automatic liquid fuel dispenser, the combination of a piston having its piston rod extending through the top of the pump cylinder, a motor actuated connecting rod, means for transmitting the movement of said connecting rod to said piston rod, said means being positioned outside said cylinder and having fixed thereto indicating means cooperable with a suitably positioned gage for indicating the displacement of'the piston.

at. In an automatic liquid fuel dispenser, a

reciprocating pump, a piston havingitspiston rod extending through stufling boxes p0- sitioned in the cylinder head of said pump, a motor: actuated connecting rod, two cross beams one of Which is attached to the upper end of said piston rod and the other to the upper end of said connecting rod, a plurality of rods connecting said cross beams and posltioned outside of the pump cylinder, one of said rods carrying an indicator cooperable with a suitably positioned gage for disclosing the relative positions of the piston within the cylinder.

5. An automatic liquid fuel dispenser comprising a reciprocating liquid fuel pump having its cylinder surrounded by and separated from a concentrically disposed heat insulating cylinder; rotary driving means for actuating said pump; a connecting rod adapted to actuate the piston of said pump, the lower end of said connecting rod being adjustably fixed in a position eccentric to the'center of said rotary means means to vary the distance of said adjustably fixed end from the center of said rotary driving means; a ventilated casing enclosing said connecting rod and said driving means; and coin actuated means to bring said driving means into operation.

6. An automaticliquid fuel dispenser comprising a coin-actuated reciprocating pump, suction lines connected to'both ends of the cylinderof said pump, a one-way valve attached to each of said suction lines, discharge lines connected to both ends of the cylinder of said pump, a one-way valve attached to each of said discharge lines, a return line, an outlet hose, and a three-way valve connected to said discharge and return lines and said hose, and'adapted to divert the flow of fuel from said discharge lines to either said return line or said hose.

In testimony whereof, I aflix my signature.

CHARLES BRAHY. 

